Merge pull request #1537 from LemmyNet/add_users_active_monthly_community_sort

Adding users active monthly for community sort. Fixes #1527

crates/db_views_actor/src/community_view.rs

@@ -193,6 +193,7 @@ impl<'a> CommunityQueryBuilder<'a> {
     match self.sort {
       SortType::New => query = query.order_by(community::published.desc()),
       SortType::TopAll => query = query.order_by(community_aggregates::subscribers.desc()),
+      SortType::TopMonth => query = query.order_by(community_aggregates::users_active_month.desc()),
       // Covers all other sorts, including hot
       _ => {
         query = query

migrations/2021-04-01-181826_add_community_agg_active_monthly_index/down.sql

@@ -0,0 +1 @@
+drop index idx_community_aggregates_users_active_month;

migrations/2021-04-01-181826_add_community_agg_active_monthly_index/up.sql

@@ -0,0 +1,2 @@
+create index idx_community_aggregates_users_active_month on community_aggregates (users_active_month desc);
+